拉取Kubernetes的yaml修改其image，env的Python腳本

#!/usr/bin/python3
# -*- coding: utf-8 -*-
#==================================================#
#使用到的三方庫PyYaml，pip install PyYaml
#用法python3 [腳本] [job-name] [file-path] [new-image] [env-name] [new-env-value]
import yaml,json,os,sys
class Change_yaml:
    '''   '''
    def __init__(self,job_name,file_path,namespace):
        self.job_name=job_name
        self.file_path=file_path+"/"+job_name+"-online.yaml"
        self.namespace=namespace

    def get_yaml_file(self):
        #通過kubectl將yaml文件輸出到指定文件
        command="kubectl get deployment/"+job_name+"-online"+" -n "+self.namespace+" -o yaml "+"> "+str(self.file_path)
        try:
            os.system(command)
            result = True
        except:
            result = False
        return result

    def file_content(self):
        #打開yaml文件讀取
        file = open(self.file_path,"r",encoding='UTF-8')
        file_content = file.read()
        file.close()
        return file_content

    def file_write(self,dict_yaml):
        #寫入文件
        file = open(self.file_path,"w")
        file.write(dict_yaml)
        file.close()

    def yaml_dict(self,yaml_content):
        #將讀取到的Yaml文件轉換爲字典格式
        yaml_dict = yaml.load(yaml_content,Loader=yaml.FullLoader)
        return yaml_dict

    def change_dict_image(self,yaml_dict,new_image):
        #修改鏡像
        yaml_dict["spec"]["template"]["spec"]["containers"][0]["image"]=new_image
        #print(yaml_dict["spec"]["template"]["spec"]["containers"][0]["image"])
        return yaml_dict

    def change_dict_env(self,yaml_dict,env_name,new_env_value):
        #修改變量
        number=0
        yaml_dict_env=yaml_dict["spec"]["template"]["spec"]["containers"][0]["env"]
        for env in yaml_dict_env:
            if env["name"] == env_name:
                old_env_value = yaml_dict["spec"]["template"]["spec"]["containers"][0]["env"][number]["value"]

                if old_env_value == new_env_value:
                    pass
                else:
                    yaml_dict["spec"]["template"]["spec"]["containers"][0]["env"][number]["value"] = new_env_value
            number+=1 
        return yaml_dict

    def dict_yaml(self,yaml_dict):
        #將dict轉換爲yaml文件
        new_yaml_str = yaml.dump(yaml_dict)
        return new_yaml_str


if __name__ == '__main__':
    namespace = "apm"
    job_name = sys.argv[1]
    file_path = sys.argv[2]
    new_image = sys.argv[3]
    env_name = sys.argv[4]
    new_env_value = sys.argv[5]

    class_func=Change_yaml(job_name,file_path,namespace)
    #拉取YAML文件
    class_func.get_yaml_file()
    #定義類
    yaml_content = class_func.file_content()
    #將YAML轉換爲dict
    yaml_dict = class_func.yaml_dict(yaml_content)
    #修改image
    yaml_dict = class_func.change_dict_image(yaml_dict,new_image)
    #修改ENV
    yaml_dict = class_func.change_dict_env(yaml_dict,env_name,new_env_value)
    #將YAML轉換爲dict
    dict_yaml = class_func.dict_yaml(yaml_dict)
    #將修改後的字符寫入到文件中
    class_func.file_write(dict_yaml)